Bathtub



FIG. 1 is an isometric view of a bathtub embodying my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a right side elevational view thereof, the left side being a mirror image of the right side shown;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof; and

FIG. 6 is a bottom plan view thereof. 

The ornamental design of a bathtub, substantially as shown and described. 